<template>
  <div class="login-container">
    <!-- 导航 -->
    <van-nav-bar class="page-nav-bar" title="登录" >
      <van-icon
      slot="left"
      name="cross"
      @click="$router.back()"
      />
    </van-nav-bar>
    <!-- 表单 -->
    <van-form @submit="onSubmit">
      <van-field
        v-model="user.mobile"
        name="手机号"
        placeholder="请输入手机号"
        :rules="userFromRules.mobile"
        type="number"
        maxlength="11"
        ref="loginForm"
      >
     <i slot="left-icon" class="toutiao toutiao-shouji"></i>
      </van-field>
      <van-field
        v-model="user.code"
        name="验证码"
        placeholder="请输入验证码"
        :rules="userFromRules.code"
        type="number"
        maxlength="6"
      >
      <i slot="left-icon" class="toutiao toutiao-yanzhengma"></i>
      <van-count-down
        v-if="inCountDownShow"
        slot="button"
        :time="1000 * 60"
        format="ss s"
        @finish="inCountDownShow = false"
      />
       <template #button>
         <van-button round size="small" type="primary" class="send-sms-btn" @click="onSendSms">发送验证码</van-button>
       </template>
      </van-field>
      <div class="login-btn">
        <van-button block  type="info" native-type="submit" class="login-b">提交</van-button>
      </div>
    </van-form>
  </div>
</template>

<script>
import { login, sendSms } from '@/api/user'
export default {
  name: 'LoginPage',
  components: {},
  props: {},
  data () {
    return {
      user: {
        mobile: '',
        code: ''
      },
      inCountDownShow: false,
      userFromRules: {
        mobile: [{
          required: true,
          message: '手机号不能为空'
        },
        {
          pattern: /^1[3|5|7|8]\d{9}$/,
          message: '手机号格式错误'
        }],
        code: [{
          required: true,
          message: '验证码不能为空'
        },
        {
          pattern: /^\d{6}$/,
          message: '验证码格式错误'
        }
        ]
      }
    }
  },
  computed: {},
  watch: {},
  created () {},
  mounted () {},
  methods: {
    async onSubmit () {
      // 获取表单数据
      const user = this.user

      // 提交表单请求登录
      this.$toast.loading({
        message: '登录中...',
        forbidClick: true, // 禁用背景点击
        duration: 0 // 持续时间,默认2秒,0表示持续展示
      })
      try {
        const { data } = await login(user)
        this.$store.commit('setUser', data.data)
        this.$toast.success('登录成功')
        // 登录成功，跳转页面
        this.$router.back()
      } catch (err) {
        if (err.response.status === 400) {
          this.$toast.fail('手机号或验证码错误')
        } else {
          this.$toast.fail('登录失败,请稍后重试')
        }
      }
    },
    async onSendSms () {
      console.log('onSendSms')
      // 1 校验手机号
      try {
        await this.$refs.loginForm.validate('mobile')
      } catch (err) {
        return console.log('验证失败', err)
      }
      // 2 通过显示到倒计时
      this.inCountDownShow = true
      // 3 请求发送验证码
      try {
        await sendSms(this.user.mobile)
        this.$toast('发送成功')
      } catch (err) {
        // 发送失败,关闭倒计时
        this.inCountDownShow = false
        if (err.response.status === 429) {
          this.$toast('发送太频繁, 请稍后重试')
        } else {
          this.$toast('发啊送失败, 请稍后重试')
        }
      }
    }
  }
}
</script>
<style scoped lang="less">
.login-container {
    .toutiao {
        font-size: 37px;
    }
    .send-sms-btn {
        border:none;
        width: 152px;
        height: 46px;
        line-height: 46px;
        background-color: #ededed;
        color: #666;
    }
    .login-btn {
        padding: 53px 33px;
        .login-b {
            background-color: #6db4fb;
        }
    }
}
</style>
